/* ===== 我们是谁 / about ===== */
.page-about {
  --about-gutter: clamp(16px, 4vw, 40px);
  --about-line: rgba(124, 141, 163, 0.22);
  --about-line-strong: rgba(124, 141, 163, 0.42);
  --about-amber-soft: rgba(245, 180, 67, 0.18);
  --about-cyan-soft: rgba(53, 232, 210, 0.12);
  display: block;
  color: var(--fg);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .section {
  position: relative;
  padding-top: clamp(46px, 7vw, 86px);
  padding-bottom: clamp(46px, 7vw, 86px);
}

.page-about figure {
  margin: 0;
}

.page-about .about-section__title {
  margin: 12px 0 14px;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-about .about-section__lead {
  max-width: 60ch;
  margin: 0;
  color: var(--fg-soft);
  line-height: 1.78;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 5vw, 60px);
  background:
    radial-gradient(130% 100% at 0% 0%, rgba(53, 232, 210, 0.13), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -20%;
  width: 48%;
  height: 150%;
  background: linear-gradient(
    135deg,
    transparent 44%,
    rgba(245, 180, 67, 0.09) 44%,
    rgba(245, 180, 67, 0.09) 47%,
    transparent 47%
  );
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 20ch;
  font-weight: 800;
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0;
  color: var(--fg-soft);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 1px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--ink-900);
}

.page-about .about-stat__num {
  font-family: var(--font-score);
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-stat__label {
  font-size: 0.82rem;
  color: var(--mist);
  line-height: 1.5;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-bottom: 0;
}

.page-about .about-timeline__figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-timeline__figure img {
  width: 100%;
  height: clamp(140px, 24vw, 280px);
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.7;
  filter: saturate(0.75);
}

.page-about .about-timeline__scroller {
  display: flex;
  gap: 14px;
  margin-top: clamp(30px, 5vw, 52px);
  padding: 30px var(--about-gutter) clamp(46px, 7vw, 80px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--mist) transparent;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__scroller::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline__scroller::-webkit-scrollbar-thumb {
  background: rgba(124, 141, 163, 0.45);
  border-radius: 3px;
}

.page-about .about-node {
  position: relative;
  flex: 0 0 min(272px, 76vw);
  scroll-snap-align: start;
  padding: 26px 18px 22px;
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-node:hover {
  border-color: rgba(53, 232, 210, 0.38);
  transform: translateY(-3px);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--about-amber-soft);
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 34px;
  right: -15px;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    rgba(245, 180, 67, 0.45) 0 6px,
    transparent 6px 13px
  );
}

.page-about .about-node:last-child::after {
  display: none;
}

.page-about .about-node__year {
  margin: 0 0 10px;
  font-family: var(--font-score);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-node__title {
  margin: 0 0 10px;
  font-size: 1.06rem;
  font-weight: 700;
  color: #fff;
}

.page-about .about-node__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--fg-soft);
}

/* ---------- 编辑组 ---------- */
.page-about .about-desk {
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-top: 1px solid var(--about-line);
}

.page-about .about-desk__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-desk__prose {
  margin-top: 4px;
}

.page-about .about-desk__prose p {
  color: var(--fg-soft);
  line-height: 1.8;
}

.page-about .about-roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-roles li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: rgba(11, 26, 46, 0.72);
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-role__num {
  font-family: var(--font-score);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.03em;
  min-width: 2ch;
}

.page-about .about-role__text {
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--fg-soft);
}

.page-about .about-role__text strong {
  color: var(--cyan-soft);
  font-weight: 700;
}

.page-about .about-desk__figure .figure__frame {
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-about .about-desk__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-desk__figure .figure__cap {
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scale {
  border-top: 1px solid var(--about-line);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--ink-900);
}

.page-about .about-figure__num {
  font-family: var(--font-score);
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--amber);
}

.page-about .about-figure__label {
  font-size: 0.84rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-scale__table {
  margin-top: clamp(28px, 4vw, 44px);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(11, 26, 46, 0.6);
}

.page-about .about-scale__table .data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.page-about .about-scale__table th,
.page-about .about-scale__table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--about-line);
  color: var(--fg-soft);
  line-height: 1.6;
}

.page-about .about-scale__table thead th {
  background: var(--ink-800);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .about-scale__table tbody th {
  color: #fff;
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-scale__table tbody tr:nth-child(even) td,
.page-about .about-scale__table tbody tr:nth-child(even) th {
  background: rgba(169, 244, 234, 0.05);
}

.page-about .about-scale__table tbody tr:last-child th,
.page-about .about-scale__table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 联络网络 ---------- */
.page-about .about-network {
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-top: 1px solid var(--about-line);
}

.page-about .about-network__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 42px);
  align-items: start;
}

.page-about .about-network__figure .figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: var(--ink-900);
}

.page-about .about-network__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-network__figure .figure__cap {
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-cities {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 8px;
}

.page-about .about-city {
  padding: 13px 14px;
  background: rgba(11, 26, 46, 0.7);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  cursor: default;
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-city:hover,
.page-about .about-city:focus-visible {
  border-color: var(--cyan);
  background: var(--about-cyan-soft);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-city__name {
  display: block;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--fg);
}

.page-about .about-city__role {
  display: block;
  margin-top: 5px;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .about-city:hover .about-city__role,
.page-about .about-city:focus-visible .about-city__role {
  color: var(--cyan-soft);
}

/* ---------- 协作生态 ---------- */
.page-about .about-partners {
  border-top: 1px solid var(--about-line);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-partner {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: rgba(18, 40, 63, 0.62);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-partner::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--amber), rgba(245, 180, 67, 0.1));
}

.page-about .about-partner__idx {
  margin: 0 0 10px;
  font-family: var(--font-score);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--amber);
}

.page-about .about-partner__title {
  margin: 0 0 12px;
  color: #fff;
}

.page-about .about-partner__text {
  margin: 0 0 16px;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--fg-soft);
}

.page-about .about-partner__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-partner__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.87rem;
  line-height: 1.65;
  color: var(--fg-soft);
}

.page-about .about-partner__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-partners__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-partners__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partners__note a:hover {
  color: var(--cyan-soft);
}

/* ---------- 做法条目 ---------- */
.page-about .about-values {
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-top: 1px solid var(--about-line);
}

.page-about .about-values__list {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  gap: 10px;
}

.page-about .about-value {
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(11, 26, 46, 0.62);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-about .about-value[open] {
  border-color: rgba(53, 232, 210, 0.42);
  background: rgba(18, 40, 63, 0.92);
}

.page-about .about-value > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fg);
}

.page-about .about-value > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-value > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--cyan);
  transition: transform 0.25s var(--ease);
}

.page-about .about-value[open] > summary::after {
  transform: rotate(45deg);
}

.page-about .about-value > summary:hover {
  color: var(--cyan-soft);
}

.page-about .about-value__body {
  padding: 0 18px 20px;
}

.page-about .about-value__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--fg-soft);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--about-line);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(245, 180, 67, 0.10), transparent 55%),
    var(--ink-900);
}

.page-about .about-next__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
  align-items: center;
}

.page-about .about-next__lead {
  max-width: 56ch;
  margin: 0;
  color: var(--fg-soft);
  line-height: 1.8;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn {
  flex: 1 1 160px;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .page-about .about-next__links {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-cities {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__title {
    font-size: 3.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-city,
  .page-about .about-value,
  .page-about .about-value > summary::after {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-city:hover,
  .page-about .about-city:focus-visible {
    transform: none;
  }
}